162 Proceedings of the Boyal Physical Society. 



small Gasteropod found at Drumsheugh, near Dean Bridge, 

 by Mr Gall, and previously to this at Eaw Camps Quarry, by 

 Mr J. Bennie, and to which I gave the name of Littorina 

 Scotolurdigalensis. Mr Gall's specimens, lent to me through 

 Mr John Henderson, were clear of the matrix, but not in a 

 good state of preservation, and only enabled me to draw up 

 the very meagre description referred to above, and which still 

 left much to be desired. Those found by Mr Bennie consti- 

 tuted a band of thin, shelly limestone at the base of the 

 Burdiehouse Limestone at Eaw Camps Quarry, and locally 

 known as " Buckie-fake." As may be supposed from the 

 nature of the rock, specimens suitable for description were 

 almost unobtainable, but Mr Bennie was fortunate enough to 

 find one or two specimens of what appeared to be the same 

 shell in the black shale connected with the shelly limestone. 

 It was upon this material that my previous description was 

 drawn up. The occurrence of this little shell in beds which 

 had previously proved, comparatively speaking, so unproduc- 

 tive of MoUuscan life, was a point of much interest. 



The great augmentation which has taken place within the 

 last three or four years in the number of recorded species of 

 Invertebrata from the Lower Carboniferous rocks of Scotland 

 is almost entirely due to the careful and painstaking researches 

 of Messrs James Bennie and John Henderson, who have con- 

 jointly brought to light a by no means inconsiderable fauna 

 from what were before considered barren and unprofitable 

 rocks. In fact, it may be said, that with the exception of the 

 late Mr Salter's investigations, since the days of Fleming, 

 Hibbert, and Ehind, little had been done towards an elucida- 

 tion of the invertebrate denizens of the old seas in which 

 those beds were accumulated, until Messrs Bennie and Hen- 

 derson commenced their labours. Under these circumstances, 

 it may well be imagined with what pleasure I have from time 

 to time examined their gatherings. Mr Bennie has lately 

 forwarded me many examples of a small shell, from Craig- 

 kelly, apparently identical with that met with at Drumsheugh 

 and Eaw Camps, and rendered all the more interesting by the 

 preservation of its colour-bands. In addition to this, Mr 

 Bennie has obtained a specimen direct from a mass of decon;i- 



